WO2022162901A1 - 外気処理装置 - Google Patents
外気処理装置 Download PDFInfo
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- WO2022162901A1 WO2022162901A1 PCT/JP2021/003358 JP2021003358W WO2022162901A1 WO 2022162901 A1 WO2022162901 A1 WO 2022162901A1 JP 2021003358 W JP2021003358 W JP 2021003358W WO 2022162901 A1 WO2022162901 A1 WO 2022162901A1
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- Prior art keywords
- outside air
- air
- heat exchanger
- flow path
- cooler
- Prior art date
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- 230000006870 function Effects 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims description 30
- 238000007791 dehumidification Methods 0.000 claims description 25
- 238000009423 ventilation Methods 0.000 claims description 23
- 230000004044 response Effects 0.000 claims description 6
- 239000002274 desiccant Substances 0.000 abstract description 56
- 238000001179 sorption measurement Methods 0.000 description 31
- 230000008929 regeneration Effects 0.000 description 29
- 238000011069 regeneration method Methods 0.000 description 29
- 238000000034 method Methods 0.000 description 16
- 238000004378 air conditioning Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 238000005057 refrigeration Methods 0.000 description 9
- 238000004891 communication Methods 0.000 description 8
- 241000700605 Viruses Species 0.000 description 7
- 238000003795 desorption Methods 0.000 description 7
- 239000000428 dust Substances 0.000 description 7
- 230000001172 regenerating effect Effects 0.000 description 5
- 230000003068 static effect Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/0008—Control or safety arrangements for air-humidification
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F3/1411—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant
- F24F3/1429—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant alternatively operating a heat exchanger in an absorbing/adsorbing mode and a heat exchanger in a regeneration mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F2003/144—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by dehumidification only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/56—Heat recovery units
Definitions
- the present disclosure relates to an outdoor air processing device that dehumidifies and humidifies outdoor air using a stationary desiccant and supplies the indoor air.
- Patent Document 1 there is technology for an air-conditioning system that dehumidifies the outside air with a rotor-type desiccant and supplies it indoors.
- Patent Document 1 when regenerating the desiccant, that is, in the step of desorbing from the desiccant the moisture adsorbed by the desiccant from the air, the return air, which is the air exhausted from the room, is heated and led to the desiccant to remove the desiccant. was playing.
- the present disclosure uses outside air as the air used to regenerate the desiccant, rather than using return air exhausted from the room.
- outside air By using outside air to regenerate the desiccant, it is possible to suppress the attachment of indoor viruses and dust to the desiccant, thereby preventing viruses and dust from diffusing into the room again.
- the outside air processing device is a heat exchanger that functions as both a heater and a cooler and that exchanges heat with the outside air; a stationary dehumidification device through which the outside air that has exchanged heat with the heat exchanger passes; The outside air that has passed through the stationary dehumidification device is directed to either the first flow path or the second flow path based on whether the heat exchanger functions as a heater or a cooler. a delivery device for selectively delivering to a path; Prepare.
- the stationary dehumidification device passes outside air that has exchanged heat with a heat exchanger that functions as both a heater and a cooler. Therefore, the desiccant, which is a static dehumidifying device, can be regenerated with outside air that has passed through the heat exchanger. In addition, since outside air passes through the static dehumidifying device after heat exchange with the heat exchanger that functions as both a heater and a cooler, the outside air processing device can be made simple in structure.
- FIG. 4 is a diagram of the first embodiment, showing adsorption operation in the dehumidifying operation mode;
- FIG. 4 is a diagram of the first embodiment, showing regeneration operation in the dehumidifying operation mode;
- FIG. 4 is a diagram of the first embodiment, showing adsorption operation in the humidification operation mode;
- FIG. 4 is a diagram of the first embodiment, showing regeneration operation in the humidification operation mode;
- Fig. 3 is a diagram of the first embodiment, showing a refrigeration cycle device 500 having the heat exchanger 10 as a first heat exchanger;
- 2 is a diagram of the first embodiment and shows a hardware configuration of the control device 101;
- FIG. FIG. 4 is a diagram of the first embodiment, showing air volume control of outside air 81 in a dehumidifying operation mode;
- FIG. 10 is a diagram of the first embodiment and is a flow chart showing control for changing the exhaust timing based on detection of a heat load;
- FIG. 10 is a diagram of the first embodiment and is a flow chart showing control for changing exhaust timing based on human detection;
- unit may be read as “circuit”, “process”, “procedure”, “process” or “circuitry” as appropriate.
- Embodiment 1 *** Configuration description *** An external air processing device 100 according to Embodiment 1 will be described with reference to FIGS. 1 to 9. FIG.
- ⁇ Dehumidification operation mode and humidification operation mode> There are two types of operation modes of the outside air processing device 100 . These two types are a dehumidification operation mode for dehumidifying the room 400 and a humidification operation mode for humidifying the room 400 .
- the dehumidifying operation mode the outside air processing device 100 supplies outside air 81 from which the moisture 4 is removed by the desiccant 20 to the room 400 .
- the humidification operation mode the outdoor air processing device 100 supplies the indoor air 81 with the moisture 4 desorbed from the desiccant 20 to the room 400 .
- Each operation mode has an adsorption operation and a desorption operation. That is, the dehumidifying operation mode has an adsorption operation and a desorption operation, and the humidification operation mode also has an adsorption operation and a desorption operation.
- the adsorption operation is an operation for causing the desiccant 20 to adsorb the moisture 4
- the desorption operation is an operation for desorbing the moisture from the desiccant 20 . Since the desorption operation is an operation for desorbing moisture from the desiccant 20, it is sometimes called a “regeneration operation”.
- the desorption operation is hereinafter referred to as "regeneration operation”.
- FIG. 1 shows the adsorption operation in the dehumidification operation mode of the outside air treatment device 100.
- FIG. 2 shows the regeneration operation in the dehumidification operation mode of the outside air treatment device 100.
- the outside air 81 in which the moisture 4 is adsorbed by the desiccant 20 is supplied to the room 400 , and the return air 82 from the room 400 is exhausted to the outside 420 .
- the outside air 81 that has obtained the moisture 4 from the desiccant 20 is exhausted to the outside 420 .
- the outside air processing device 100 includes an exhaust fan 2 a , an air supply fan 2 b , a total heat exchanger 8 , a heat exchanger 10 , a desiccant 20 and a damper device 30 .
- Desiccant 20 is a static dehumidifying device.
- the damper device 30 is a delivery device.
- the total heat exchanger 8 is provided with an exhaust fan 2a and an air supply fan 2b.
- the exhaust fan 2 a sends return air 82 and the supply air fan 2 b sends outside air 81 .
- the heat exchanger 10 functions as both a heater and a cooler, and exchanges heat with the outside air 81 .
- the heat exchanger 10 functions as either a heater or a cooler under the control of the refrigeration cycle device 500 by the device controller 112 .
- the heat exchanger 10 functions as a heater, it is written as a heater 10H, and when the heat exchanger 10 functions as a cooler, it is written as a cooler 10C.
- the heat exchanger 10 is installed to exchange heat with the outside air 81 .
- the desiccant 20 passes the outside air 81 that has exchanged heat with the heat exchanger 10 .
- the desiccant 20 adsorbs the moisture 4 from the outside air 81 when the outside air 81 cooled by the cooler 10C passes, and desorbs the moisture 4 to the outside air 81 when the outside air 81 heated by the heater 10H passes.
- the damper device 30 divides the outside air 81 that has passed through the desiccant 20 into the first flow path 41 and the second flow path 42 based on whether the heat exchanger 10 functions as the heater 10H or the cooler 10C. selectively delivered to one of the channels. As will be described later, in the dehumidifying operation mode, the damper device 30 sends the outside air 81 that has passed through the desiccant 20 to the second flow path 42 if the heat exchanger 10 is functioning as the heater 10H, If the heat exchanger 10 is functioning as the cooler 10 ⁇ /b>C, it is delivered to the first flow path 41 .
- the damper device 30 sends the outside air 81 that has passed through the desiccant 20 to the first flow path 41 if the heat exchanger 10 is functioning as the heater 10H. is functioning in the cooler 10C, it is sent to the second flow path 42.
- the damper device 30 has a first damper 31 and a second damper 32 .
- the first damper 31 has a door 31a and the second damper 32 has a door 32a. Doors 31a and 32a are opened and closed under the control of device control section 112 .
- the heat exchanger 10 and the desiccant 20 are arranged in order downstream of the air passage of the outside air 81 , and the damper device 30 is arranged downstream of the desiccant 20 .
- the first damper 31 opens and closes the first flow path 41 for supplying the outside air 81 to the room 400
- the second damper 32 opens and closes the second flow path 42 for discharging the outside air 81 to the outside 420 . .
- the outside air processing device 100 further includes a control device 101 and an input device 102 for inputting information to the control device 101 .
- the user of the outside air processing device 100 can input from the input device 102 whether to operate the outside air processing device 100 in the dehumidifying operation mode or the humidifying operation mode.
- the outside air processing device 100 is installed in the ceiling space 410 .
- An air conditioner 300 is also installed in the ceiling space 410 .
- the air conditioner 300 air-conditions the room 400 .
- a temperature sensor 113 a and a temperature sensor 113 a are installed in the room 400 .
- the temperature sensor 113a is used in control for changing the exhaust timing by detecting a heat load, which will be described later with reference to FIG.
- the temperature sensor 115a is used in control for changing the exhaust timing based on human detection, which will be described later with reference to FIG.
- the damper device 30 supplies the first flow path 41 to the supply flow path leading to the ventilation area, which is the area to which the outside air 81 is supplied and where the air is exhausted as the outside air 81 is supplied. As channel 42, it is delivered to another area channel leading to another area different from the ventilation area.
- the indoor 400 is a ventilation area
- the outdoor 420 is another area different from the ventilation area.
- the outside air processing device 100 includes a control device 101 .
- the control device 101 causes the instruction receiving unit 111 that receives a dehumidifying instruction to instruct the dehumidifying operation mode via the input device 102, and the heat exchanger 10 to function as either the heater 10H or the cooler 10C.
- the device control unit 112 causes the damper device 30 to flow the outside air 81 into another region in response to the heat exchanger 10 functioning as the heater 10H.
- the outside air 81 is sent to the damper device 30 in response to the fact that the heat exchanger 10 is made to function as the cooler 10C and the first flow path that is the supply flow path. 41.
- FIG. 3 shows adsorption operation in the humidification operation mode of the outside air treatment device 100 .
- FIG. 4 shows regeneration operation in the humidification operation mode of the outside air processing device 100 .
- the configurations of FIGS. 3 and 4 are the same as those of FIGS. 1 and 2, but the flow of outside air 81 and return air 82 is different.
- the outside air 81 in which the moisture 4 is adsorbed by the desiccant 20 is exhausted to the outside 420 .
- the regeneration operation in the humidification operation mode the outside air 81 that has obtained the moisture 4 from the desiccant 20 is supplied to the room 400 , and the return air 82 from the room 400 is exhausted to the outside 420 .
- the instruction receiving unit 111 receives, via the input device 102, a humidification instruction instructing the humidification operation mode.
- the device control unit 112 supplies the outside air 81 to the damper device 30 in response to the heat exchanger 10 functioning as the heater 10H. and the heat exchanger 10 functions as the cooler 10C. 42.
- FIG. 5 shows a refrigeration cycle device 500 for causing heat exchanger 10 to function as heater 10H and cooler 10C.
- the refrigeration cycle device 500 includes a compressor 501 , a four-way valve 502 , a heat exchanger 10 as a first heat exchanger, an expansion valve 503 and a second heat exchanger 504 .
- the heat exchanger 10 functions as either the heater 10H or the cooler 10C.
- the device control unit 112 controls the frequency of the compressor 501 to control the temperature of the heat exchanger 10 .
- FIG. 6 shows the hardware configuration of the control device 101.
- the control device 101 is a computer.
- the control device 101 comprises a processor 110 .
- the control device 101 includes other hardware such as a main memory device 120 , an auxiliary memory device 130 , an input interface 140 , an output interface 150 and a communication interface 160 in addition to the processor 110 .
- Processor 110 is connected to other hardware via signal line 170 and controls the other hardware.
- the control device 101 includes an instruction receiving unit 111, a device control unit 112, a heat load detection unit 113, and a human detection unit 114 as functional elements. Functions of the instruction receiving unit 111 , the device control unit 112 , the heat load detection unit 113 and the human detection unit 114 are implemented by the control program 103 .
- the processor 110 is a device that executes the control program 103 .
- the control program 103 is a program that implements the functions of the instruction receiving unit 111 , device control unit 112 , heat load detection unit 113 and human detection unit 114 .
- the processor 110 is an IC (Integrated Circuit) that performs arithmetic processing. Specific examples of the processor 110 are a CPU (Central Processing Unit), a DSP (Digital Signal Processor), and a GPU (Graphics Processing Unit).
- the main storage device 120 stores data in a volatile manner. Specific examples of the main memory device 120 are SRAM (Static Random Access Memory) and DRAM (Dynamic Random Access Memory). The main memory device 120 holds the computation results of the processor 110 .
- the auxiliary storage device 130 stores data in a non-volatile manner.
- a specific example of the auxiliary storage device 130 is an HDD (Hard Disk Drive).
- the auxiliary storage device 130 is a portable recording medium such as an SD (registered trademark) (Secure Digital) memory card, NAND flash, flexible disk, optical disk, compact disk, Blu-ray (registered trademark) disk, DVD (Digital Versatile Disk). There may be.
- the auxiliary storage device 130 stores the control program 103 .
- the input interface 140 is a port through which data is input from each device.
- the output interface 150 is a port to which various devices are connected and data is output from the processor 110 to the various devices.
- the input device 102 is connected to the input interface 140 .
- the communication interface 160 is a communication port for the processor 110 to communicate with other devices.
- the communication interface 160 is connected to the first damper 31, the second damper 32, the exhaust fan 2a, the air supply fan 2b, the temperature sensor 113a, the human sensor 114a, and the refrigeration cycle device 500.
- the processor 110 loads the control program 103 from the auxiliary storage device 130 to the main storage device 120, reads the control program 103 from the main storage device 120, and executes it.
- the control device 101 may include multiple processors in place of the processor 110 . These multiple processors share the execution of the control program 103 .
- Each processor like processor 110 , is a device that executes control program 103 . Data, information, signal values and variable values used, processed or output by control program 103 are stored in main memory 120 , auxiliary memory 130 , or registers or cache memory within processor 110 .
- each processing, each procedure or It is a program that causes a computer to execute each step.
- control method is a method performed by the control device 101, which is a computer, executing the control program 103.
- the control program 103 may be stored in a computer-readable recording medium and provided, or may be provided as a program product.
- Adsorption operation in dehumidification operation mode The adsorption operation in the dehumidifying operation mode will be described with reference to FIG.
- the device control unit 112 operates both the exhaust fan 2a and the air supply fan 2b.
- Heat exchanger 10 (cooler 10C): The outside air 81 that has passed through the total heat exchanger 8 is cooled by exchanging heat with the heat exchanger 10 functioning as the cooler 10C under the control of the device control unit 112, thereby increasing the relative humidity.
- Desiccant 20 Outside air 81 with a high relative humidity passes through the desiccant 20 . At this time, the desiccant 20 adsorbs the moisture 4 in the outside air 81 .
- Damper device 30 Under the control of the device control section 112, the door 31a of the first damper 31 is open and the door 32a of the second damper 32 is closed.
- the outside air 81 dehumidified by the desiccant 20 passes through the first damper 31 , is sent to the first flow path 41 , and is supplied from the outside air supply port 61 into the room 400 .
- the device control unit 112 operates the exhaust fan 2a.
- the return air 82 in the room 400 is sucked into the return air intake port 51 , passes through the exhaust fan 2 a and the total heat exchanger 8 , and is exhausted from the return air discharge port 62 to the outside 420 .
- Regenerative operation in dehumidifying operation mode The regeneration operation in the dehumidifying operation mode will be described with reference to FIG. Regenerative operation is as follows. During the regeneration operation, as shown in FIG. 2, the device control section 112 stops the exhaust fan 2a and operates only the air supply fan 2b. Further, the device control unit 112 causes the heat exchanger 10 to function as the heater 10H. (1) Total heat exchanger 8: Outside air 81 is sucked into the air supply fan 2 b from the outside air intake port 52 and passes through the total heat exchanger 8 . Since the return air 82 in the room 400 is not discharged as will be described later, the outside air 81 does not exchange total heat with the return air 82 in the total heat exchanger 8 .
- Heat exchanger 10 (heater 10H): The outside air 81 that has passed through the total heat exchanger 8 is heated by exchanging heat with the heat exchanger 10 functioning as the heater 10H under the control of the device control unit 112, thereby reducing the relative humidity.
- Desiccant 20 Outside air 81 with a low relative humidity passes through the desiccant 20 . At this time, the moisture 4 adsorbed to the desiccant 20 is desorbed to the outside air 81 .
- Damper device 30 Under the control of the device control section 112, the door 31a of the first damper 31 is closed and the door 32a of the second damper 32 is open.
- the outside air 81 humidified by the desiccant 20 passes through the second damper 32 , is sent to the second flow path 42 , and is discharged from the outside air outlet 63 to the outside 420 .
- the exhaust fan 2 a Since the exhaust fan 2 a is in a stopped state, the return air 82 in the room 400 is not discharged from the return air discharge port 62 .
- Adsorption operation in humidification operation mode The adsorption operation in the humidification operation mode will be described with reference to FIG. As shown in FIG. 3, during the adsorption operation, the device control unit 112 stops the exhaust fan 2a and operates only the air supply fan 2b.
- Total heat exchanger 8 Outside air 81 is sucked into the air supply fan 2 b from the outside air intake port 52 and passes through the total heat exchanger 8 .
- Desiccant 20 Outside air 81 with a high relative humidity passes through the desiccant 20 . At this time, the desiccant 20 adsorbs the moisture 4 in the outside air 81 .
- Damper device 30 Under the control of the device control section 112, the door 31a of the first damper 31 is closed and the door 32a of the second damper 32 is open. The outside air 81 dehumidified by the desiccant 20 passes through the second damper 32 , is sent to the second flow path 42 , and is supplied from the outside air outlet 63 to the outside 420 .
- Return air 82 Since the exhaust fan 2 a is in a stopped state, the return air 82 in the room 400 is not discharged from the return air discharge port 62 .
- Heat exchanger 10 (heater 10H): The outside air 81 that has passed through the total heat exchanger 8 is heated by exchanging heat with the heat exchanger 10 functioning as the heater 10H under the control of the device control unit 112, thereby reducing the relative humidity.
- Desiccant 20 Outside air 81 with a low relative humidity passes through the desiccant 20 . At this time, the moisture 4 adsorbed to the desiccant 20 is desorbed to the outside air 81 .
- Damper device 30 Under the control of the device control section 112, the door 31a of the first damper 31 is open and the door 32a of the second damper 32 is closed.
- the outside air 81 humidified by the desiccant 20 passes through the first damper 31 , is sent to the first flow path 41 , and is supplied from the outside air supply port 61 into the room 400 .
- the device control unit 112 operates the exhaust fan 2a.
- the return air 82 in the room 400 is sucked into the return air intake port 51 , passes through the exhaust fan 2 a and the total heat exchanger 8 , and is exhausted from the return air discharge port 62 to the outside 420 .
- FIG. 7 is a diagram showing air volume control of the outside air 81 in the dehumidifying operation mode.
- the horizontal axis indicates the supply time of the outside air 81 to the room 400 .
- the unit is minutes (min).
- the vertical axis indicates the unit supply air volume.
- the unit supply air volume is the air volume of the outside air 81 supplied to the room 400 per minute.
- the unit is m 3 /min.
- the outside air processing device 100 considers the ventilation stop time (exhaust stop period of the return air 82) during the regeneration operation in the dehumidifying operation mode, and satisfies the required ventilation amount per unit time. , to adjust the air supply volume.
- the apparatus control unit 112 controls the rotation speed of the air supply fan 2b to adjust the intake amount of the outside air 81, which is the amount of supply air, from the outside air intake port 52 in the adsorption operation in the dehumidification operation mode.
- a specific description will be made with one hour as the reference time.
- the device control unit 112 controls the refrigeration cycle device 500 to adjust the regeneration operation time (FIG. 2) for exhausting the outside air 81 to the outdoor 420.
- the amount of heating of the outside air 81 by the heater 10H during the regeneration operation may be controlled.
- the period "60-t1" in FIG. 7 can be accurately obtained, so that the ventilation volume can be controlled more accurately.
- the timing to start the regeneration operation for discharging the outside air 81 may be determined by a timer, or a certain time within the reference time (one hour in the above example), for example, 12:00 within the reference time. If it is included, it may be determined as 12 o'clock.
- the terms exhaust operation and supply operation are used. These have the following meanings.
- the exhaust operation is an operation in which the outside air 81 that has passed through the desiccant 20 is exhausted from the second flow path 42 to the outside 420 .
- the air supply operation is an operation in which the outside air 81 that has passed through the desiccant 20 is supplied from the first flow path 41 into the room 400 .
- the exhaust operation is the regeneration operation of FIG.
- the exhaust operation is the adsorption operation of FIG.
- the air supply operation is the adsorption operation of FIG.
- the air supply operation is the regeneration operation of FIG. Since the description here is for the dehumidification mode of operation, exhaust operation is regeneration operation. For example, in the morning, the load on the air conditioning system is high because the operation of the air conditioning system is started. For this reason, it is conceivable that the outside air processing device 100 performs an exhaust operation to suppress the amount of ventilation.
- the return air 82 in the room 400 is not exhausted to the outside 420, so the air in the room 400 is controlled by the air conditioning system so as to approach the set temperature without being ventilated. Therefore, the load on the air conditioning system is low.
- Adjustment of air supply air volume in humidification operation mode is the same as the adjustment of the air supply air volume in the dehumidification operation mode.
- the outside air 81 is supplied to the room 400 during the regeneration operation, and the outside air 81 is exhausted to the outside 420 during the adsorption operation. Therefore, the adjustment of the amount of supplied air in the humidification operation mode is performed during the regeneration operation.
- the device control unit 112 controls the refrigeration cycle device 500 to adjust the adsorption operation time for exhausting the outside air 81 to the outdoor 420. Cooling of the outside air 81 by the cooler 10C may be controlled. As a result, the period of "60-t1" in FIG. 07 can be accurately obtained, so that the ventilation volume can be controlled more accurately.
- the timing to start the adsorption operation for discharging the outside air 81 may be determined by a timer, or a certain time within the reference time (one hour in the above example), for example, 12:00 within the reference time. If it is included, it may be determined as 12 o'clock. Since this is a description of the humidification operation mode, the exhaust operation is the adsorption operation. For example, in the morning, the load on the air conditioning system is high because the operation of the air conditioning system is started. For this reason, it is conceivable that the outside air processing device 100 performs an exhaust operation to suppress the amount of ventilation.
- the return air 82 in the room 400 is not exhausted to the outside 420, so the air in the room 400 is controlled by the air conditioning system so as to approach the set temperature without being ventilated. Therefore, the load on the air conditioning system is low.
- FIG. 8 is a flowchart showing the operation of the outside air treatment device 100 when the outside air treatment device 100 is equipped with the heat load detection unit 113.
- the control device 101 includes a heat load detection unit 113 that detects the heat load of the air conditioner 300 that air-conditions the room 400, which is the ventilation area.
- the device control unit 112 causes the damper device 30 to send the outside air 81 to the second channel 42, which is the separate region channel, when the detected heat load is greater than the threshold value.
- the thermal load detection unit 113 is connected to the temperature sensor 113a via the communication interface 160, and detects the temperature Ti of the room 400 from the temperature sensor 113a. Also, the heat load detection unit 113 acquires the set temperature Ts of the room 400 for the air conditioner 300 via the communication interface 160 from an air conditioning control device (not shown) that controls the air conditioner 300 .
- Thermal load detection unit 113 detects a thermal load to be processed by air conditioner 300 .
- the thermal load is the difference ⁇ T between the set temperature Ts acquired by the thermal load detection unit 113 and the temperature Ti in the room 400 detected via the temperature sensor 113a.
- ⁇ T is given by Equation 4.
- ⁇ T is assumed to be the heat load.
- step S101 the instruction receiving unit 111 acquires the current time, the exhaust time setting value (corresponding to "60-t1" in FIG. 7), and the reference time (corresponding to 1 hour in FIG. 7).
- the thermal load detector 113 calculates the thermal load ⁇ T.
- Step S102> The thermal load detection unit 113 determines whether the thermal load ⁇ T is greater than the threshold TH1. If so, the process proceeds to step S103; otherwise, the process proceeds to step S109.
- step S103 the device control unit 112 determines whether the exhaust operation (the regeneration operation in the dehumidification operation mode and the adsorption operation in the humidification operation mode) is being performed within the reference time. If the exhaust operation has not been performed within the reference time, the process proceeds to step S104. If the exhaust operation is being performed within the reference time, the process proceeds to step S105.
- step S104 the device control unit 112 performs an exhaust operation.
- the exhaust operation is the regeneration operation in the dehumidification operation mode, and the adsorption operation in the humidification operation mode. Exhaust operation can suppress an increase in heat load due to an increase in ventilation.
- step S105 the device control unit 112 performs air supply operation.
- the air supply operation is the adsorption operation in the dehumidification operation mode, and the regeneration operation in the humidification operation mode.
- step S106 the device control unit 112 determines whether the exhaust time (equivalent to "60-t1"), which is the exhaust operation time, is equal to or greater than the exhaust time set value. If YES in step S106, the process proceeds to step S107, and if NO, the process proceeds to step S108.
- step S107> the device control unit 112 starts supplying the outside air 81 .
- the air supply operation is the adsorption operation in the dehumidification operation mode, and the regeneration operation in the humidification operation mode.
- step S108 the device control unit 112 continues the exhaust operation from step S104.
- the exhaust operation is the regeneration operation in the dehumidification operation mode, and the adsorption operation in the humidification operation mode.
- step S109 the device control unit 112 determines whether or not the exhaust operation is to be performed within a reference period of time (for example, within 60 minutes).
- the exhaust operation is the regeneration operation in the dehumidification operation mode, and the adsorption operation in the humidification operation mode. If the exhaust operation has not been performed within the reference time, the process proceeds to step S110. If the exhaust operation is being performed within the reference time, the process proceeds to step S113.
- Step S110 if the remaining time (elapsed time within the reference time) of the reference time (60 minutes) is equal to or less than the required exhaust operation time (YES in step S110), the device control unit 112 Move on to driving.
- the exhaust operation is the regeneration operation in the dehumidification operation mode, and the adsorption operation in the humidification operation mode.
- step S110 if the remaining time (elapsed time within the reference time) of the reference time (60 minutes) is greater than the required exhaust operation time (NO in step S110), device control unit 112 performs air supply in step S112. Continue driving.
- FIG. 9 is a flow chart showing the operation of the outside air processing device 100 including the human detection unit 114.
- the control device 101 includes a human detection unit 114 that detects the number of people present in the room 400, which is the ventilation area. When the number of people detected by the human detection unit 114 is smaller than the threshold TH2, the device control unit 112 causes the damper device 30 to send the outside air 81 to the second flow path 42, which is the separate area flow path. A specific description will be given below.
- the human detection unit 114 is connected to the human sensor 114a via the communication interface 160, and detects the number of people present in the room 400 from the human sensor 114a.
- FIG. 9 is similar to FIG. Steps S201 to S212 respectively correspond to steps S101 to S112. Steps S203 to S212 are the same as steps S103 to S112, respectively, except that steps S201 and S202 are different from steps S101 and S102. Therefore, steps S201 and S202 will be described.
- step S201 the instruction receiving unit 111 acquires the current time, the set value of the exhaust time, and the reference time.
- the human detection unit 114 acquires the number of people from the human sensor 114a.
- the human detection unit 114 detects the number of people present in the room 400 via the human sensor 114a.
- Step S202> The human detection unit 114 determines whether the detected number of people is smaller than a threshold TH2. If so, the process proceeds to step S203; otherwise, the process proceeds to step S209. Since the subsequent processing is the same as in FIG. 8 as described above, the description is omitted.
- the outside air processing device 100 of Embodiment 1 regenerates the desiccant 20 without using the return air 82 . Therefore, it is possible to prevent viruses and dust present in the room 400 from adhering to the desiccant 20 . As a result, viruses and dust can be prevented from diffusing into the room, and viruses and dust can be efficiently exhausted.
- the outside air processing device 100 adjusts the air volume in consideration of the ventilation stop time in the exhaust operation in which the outside air 81 is exhausted to the outside 420 . Therefore, the required ventilation volume per unit time can be satisfied. These can provide a healthy and comfortable space.
- the device control unit 112 of the outside air processing device 100 opens and closes the doors 31a and 32a of the damper device 30 depending on whether the heat exchanger 10 functions as the heater 10H or the cooler 10C. Since it is controlled, there is an effect that the outside air processing device 100 can be realized with a simple configuration.
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Abstract
Description
加熱器としても冷却器としても機能し、外気と熱交換する熱交換器と、
前記熱交換器と熱交換した前記外気が通過する静止型除湿デバイスと、
前記静止型除湿デバイスを通過した前記外気を、前記熱交換器が加熱器と冷却器とのどちらで機能しているかに基づいて、第1流路と第2流路との何れか一方の流路へ選択的に送出する送出装置と、
を備える。
***構成の説明***
図1から図9を参照して、実施の形態1の外気処理装置100を説明する。
外気処理装置100の運転モードには2種類ある。この2種類は、室内400を除湿する除湿運転モードと、室内400を加湿する加湿運転モードである。除湿運転モードでは、外気処理装置100は、デシカント20によって水分4を除いた外気81を、室内400に供給する。加湿運転モードでは、外気処理装置100は、デシカント20から脱着した水分4が与えられた外気81を、室内400に供給する。
また、それぞれの運転モードにおいて、吸着運転と脱着運転がある。つまり、除湿運転モードには吸着運転と脱着運転があり、加湿運転モードにも吸着運転と脱着運転がある。吸着運転とはデシカント20に水分4を吸着させる運転であり、脱着運転とはデシカント20から水分を脱着する運転である。脱着運転はデシカント20から水分を脱着する運転であるため「再生運転」と呼ばれることがある。以下では脱着運転を「再生運転」と表記する。
図1は、外気処理装置100の除湿運転モードにおける吸着運転を示す。
図2は、外気処理装置100の除湿運転モードにおける再生運転を示す。
除湿運転モードにおける吸着運転では、デシカント20によって水分4の吸着された外気81が室内400へ供給され、また、室内400の還気82が室外420へ排気される。除湿運転モードにおける再生運転では、デシカント20から水分4を得た外気81が室外420へ排気される。
図1を参照して、外気処理装置100の構成を説明する。外気処理装置100は、排気ファン2a、給気ファン2b、全熱交換器8、熱交換器10、デシカント20及びダンパー装置30を備えている。デシカント20は静止型除湿デバイスである。ダンパー装置30は送出装置である。全熱交換器8には排気ファン2a、給気ファン2bが設置されている。排気ファン2aが還気82を送り、給気ファン2bが外気81を送る。熱交換器10は、加熱器としても冷却器としても機能し、外気81と熱交換する。熱交換器10は、冷凍サイクル装置500への装置制御部112の制御によって、加熱器と冷却器とのどちらでも機能する。熱交換器10が加熱器として機能する場合には加熱器10Hと表記し、熱交換器10が冷却器として機能する場合には冷却器10Cと表記する。熱交換器10は外気81と熱交換するために設置されている。デシカント20は、熱交換器10と熱交換した外気81が通過する。デシカント20は、冷却器10Cに冷やされた外気81が通過するときには、外気81から水分4を吸着し、加熱器10Hに加熱された外気81が通過するときには、外気81へ水分4を脱着する。ダンパー装置30は、デシカント20を通過した外気81を、熱交換器10が加熱器10Hと冷却器10Cとのどちらで機能しているかに基づいて、第1流路41と第2流路42との何れか一方の流路へ選択的に送出する。後述のように、除湿運転モードの場合には、ダンパー装置30は、デシカント20を通過した外気81を、熱交換器10が加熱器10Hで機能してれば第2流路42へ送出し、熱交換器10が冷却器10Cで機能していれば、第1流路41へ送出する。また加湿運転モードの場合には、ダンパー装置30は、デシカント20を通過した外気81を、熱交換器10が加熱器10Hで機能してれば第1流路41へ送出し、熱交換器10が冷却器10Cで機能していれば、第2流路42へ送出する。ダンパー装置30は、第1ダンパー31と第2ダンパー32とを備えている。第1ダンパー31は扉31aを備え、第2ダンパー32は扉32aを備える。扉31aおよび扉32aは、装置制御部112の制御によって開閉する。
図3は、外気処理装置100の加湿運転モードにおける吸着運転を示す。
図4は、外気処理装置100の加湿運転モードにおける再生運転を示す。
図3および図4の構成は、図1および図2と同じであるが、外気81と還気82の流れ方が異なる。加湿運転モードにおける吸着運転では、デシカント20によって水分4の吸着された外気81が室外420へ排気される。加湿運転モードにおける再生運転では、デシカント20から水分4を得た外気81が室内400へ供給され、また、室内400の還気82が室外420へ排気される。
図5は、熱交換器10を加熱器10Hおよび冷却器10Cとして機能させるための冷凍サイクル装置500を示す。冷凍サイクル装置500は、圧縮機501、四方弁502、第1熱交換器である熱交換器10、膨張弁503、第2熱交換器504を備えている。制御装置101の装置制御部112が四方弁502を切り替えることで、熱交換器10は加熱器10Hと冷却器10Cとのいずれかとして機能する。また装置制御部112が圧縮機501の周波数を制御することで、熱交換器10の温度を制御する。
<A1.除湿運転モードでの吸着運転>
図1を参照して除湿運転モードでの吸着運転を説明する。図1に示すように、吸着運転時には、装置制御部112は、排気ファン2aおよび給気ファン2bの両方を稼働させる。
(1)全熱交換器8:
外気81は、外気吸入口52から給気ファン2bに吸い込まれ、全熱交換器8を通過する。このとき外気81は全熱交換器8を通過する還気82と全熱交換する。
(2)熱交換器10(冷却器10C):
全熱交換器8を通過した外気81は、装置制御部112の制御によって冷却器10Cとして機能している熱交換器10と熱交換して冷やされて、相対湿度が高まる。
(3)デシカント20:
相対湿度の高い外気81は、デシカント20を通過する。この時、デシカント20は、外気81の水分4を吸着する。
(4)ダンパー装置30:
装置制御部112の制御によって、第1ダンパー31の扉31aは開いており、第2ダンパー32の扉32aは閉じている。デシカント20によって除湿された外気81は、第1ダンパー31を通過して第1流路41へ送出され、外気供給口61から室内400へ供給される。
(5)還気82:
装置制御部112は排気ファン2aを稼働している。室内400の還気82は還気吸入口51へ吸い込まれて排気ファン2a、全熱交換器8を経て、還気排出口62から室外420へ排気される。
図2を参照して除湿運転モードでの再生運転を説明する。再生運転は以下のようである。再生運転時には図2に示すように、装置制御部112は、排気ファン2aを停止させ、給気ファン2bのみを稼働する。また、装置制御部112は、熱交換器10を加熱器10Hとして機能させる。
(1)全熱交換器8:
外気81は、外気吸入口52から給気ファン2bに吸い込まれ、全熱交換器8を通過する。後述のように室内400の還気82は排気されないので、外気81は全熱交換器8において還気82と全熱交換はしない。
(2)熱交換器10(加熱器10H):
全熱交換器8を通過した外気81は、装置制御部112の制御によって加熱器10Hとして機能している熱交換器10と熱交換して加熱されて、相対湿度が低下する。
(3)デシカント20:
相対湿度の低い外気81は、デシカント20を通過する。この時、デシカント20に吸着されている水分4は、外気81へ脱着する。
(4)ダンパー装置30:
装置制御部112の制御によって、第1ダンパー31の扉31aは閉じており、第2ダンパー32の扉32aは開いている。デシカント20によって加湿された外気81は、第2ダンパー32を通過して第2流路42へ送出され、外気排出口63から室外420へ排出される。
(5)排気ファン2aは停止状態なので、室内400の還気82は、還気排出口62から排出されない。
図3を参照して加湿運転モードでの吸着運転を説明する。図3に示すように、吸着運転時には、装置制御部112は、排気ファン2aを停止し、給気ファン2bのみを稼働させる。
(1)全熱交換器8:
外気81は、外気吸入口52から給気ファン2bに吸い込まれ、全熱交換器8を通過する。
(2)熱交換器10(冷却器10C):
全熱交換器8を通過した外気81は、装置制御部112の制御によって冷却器10Cとして機能している熱交換器10と熱交換して冷やされて、相対湿度が高まる。
(3)デシカント20:
相対湿度の高い外気81は、デシカント20を通過する。この時、デシカント20は、外気81の水分4を吸着する。
(4)ダンパー装置30:
装置制御部112の制御によって、第1ダンパー31の扉31aは閉じており、第2ダンパー32の扉32aは開いている。デシカント20によって除湿された外気81は、第2ダンパー32を通過して第2流路42へ送出され、外気排出口63から室外420へ供給される。
(5)還気82:
排気ファン2aは停止状態なので、室内400の還気82は、還気排出口62から排出されない。
図4を参照して加湿運転モードでの再生運転を説明する。図4に示すように、再生運転時には、装置制御部112は、排気ファン2aおよび給気ファン2bの両方を稼働させる。
(1)全熱交換器8:
外気81は、外気吸入口52から給気ファン2bに吸い込まれ、全熱交換器8を通過する。このとき外気81は全熱交換器8を通過する還気82と全熱交換する。
(2)熱交換器10(加熱器10H):
全熱交換器8を通過した外気81は、装置制御部112の制御によって加熱器10Hとして機能している熱交換器10と熱交換して加熱されて、相対湿度が低下する。
(3)デシカント20:
相対湿度の低い外気81は、デシカント20を通過する。この時、デシカント20に吸着されている水分4は、外気81へ脱着する。
(4)ダンパー装置30:
装置制御部112の制御によって、第1ダンパー31の扉31aは開いており、第2ダンパー32の扉32aは閉じている。デシカント20によって加湿された外気81は、第1ダンパー31を通過して第1流路41へ送出され、外気供給口61から室内400へ供給される。
(5)還気82:
装置制御部112は排気ファン2aを稼働している。室内400の還気82は還気吸入口51へ吸い込まれて排気ファン2a、全熱交換器8を経て、還気排出口62から室外420へ排気される。
装置制御部112は、ダンパー装置30によって別領域流路である第2流路42へ送出される外気の風量に応じて、ダンパー装置30によって供給流路である第1流路41へ送出される外気81の風量を制御する。具体的には以下のようである。
図7は、除湿運転モードでの外気81の風量制御を示す図である。横軸は、外気81の室内400への供給時間を示す。単位は分(min)である。縦軸は、単位供給風量を示す。単位供給風量は、室内400への外気81の1分間あたりの供給風量である。単位はm3/minである。図7に示すように、外気処理装置100は、除湿運転モードの再生運転時における換気停止時間(還気82の排気停止期間)を考慮して、単位時間あたりに必要な換気量を満足するため、給気風量の調整を行う。装置制御部112が給気ファン2bの回転数を制御することで、除湿運転モードの吸着運転において、給気風量である外気81の外気吸入口52からの吸入量が調整される。1時間を基準時間として、具体的に説明する。1時間に必要な換気量Q0に対して、図2の再生運転時に換気が停止する時間(図中の60-t1)を考慮して、吸着運転時の風量Q1について、以下の式1として風量を設定する。これにより、基準時間あたりの必要換気量は満足できる。
Q0×60÷t1 (式1)
風量Q1は以下の計算による。図7で四角形S0と四角形S1の面積が等しくなるべきである。風量の単位はm3/minとする。風量Q0で基準の1時間に供給される風量Qaは、式2である。
Qa=Q0(m3/min)×60(min) (式2)
である。
風量Q1で基準の1時間のうちのt1(min)に供給される風量Qbは、式3である。
Qb=Q1(m3/min)×t1(min) (式3)
Qa=Qbであるので、
Q0×60=Q1×t1である。
よって、Q1は式3で与えられる。
Q1=Q0×(60/t1) (式3)
除湿運転モードでの給気風量の調整とき、外気81を室外420へ排気する再生運転の時間(図2)を調整するために、装置制御部112は、冷凍サイクル装置500を制御することで、再生運転時の加熱器10Hによる外気81に対する加熱量を制御してもよい。これにより、図7の「60-t1」の期間を正確に得ることができるので、より正確に換気量の制御が可能になる。
除湿運転モードにおいて、外気81を排出する再生運転を開始するタイミングはタイマーで決めても良いし、基準時間(上述の例では1時間)の中のある時刻、例えば、基準時間内に12時を含む場合は12時、などとして決めても良い。以下では、排気運転及び給気運転の用語を使用する。これらは以下の意味である。排気運転とは、デシカント20を通過した外気81を第2流路42から室外420へ排気する運転である。給気運転とは、デシカント20を通過した外気81を第1流路41から室内400へ給気する運転である。除湿運転モードでは、排気運転は、図2の再生運転である。加湿運転モードでは、排気運転は、図3の吸着運転である。除湿運転モードでは、給気運転は、図1の吸着運転である。加湿運転モードでは、給気運転は、図4の再生運転である。ここの説明は除湿運転モードであるので、排気運転とは、再生運転である。例えば、朝は、空気調和システムの運転を開始するので空気調和システムにとって負荷が高い。このため、外気処理装置100は排気運転を行い、換気量を抑制することも考えられる。つまり、排気運転では、室内400の還気82が室外420へ排気されないので、室内400の空気は換気されることなく、空気調和システムによって設定温度に近づくように制御される。よって空気調和システムにとって負荷が低い。
加湿運転モードでの給気風量の調整は、除湿運転モードでの給気風量の場合と同じである。加湿運転モードでは、再生運転の際に外気81が室内400に供給され、吸着運転の際に外気81が室外420へ排気される。よって加湿運転モードでの給気風量の調整は、再生運転の際に実行される。
加湿運転モードでの給気風量の調整とき、外気81を室外420へ排気する吸着運転の時間を調整するために、装置制御部112は、冷凍サイクル装置500を制御することで、吸着運転時の冷却器10Cによる外気81に対する冷却を制御してもよい。これにより、図07の「60-t1」の期間を正確に得ることができるので、より正確に換気量の制御が可能になる。
加湿運転モードにおいて、外気81を排出する吸着運転を開始するタイミングはタイマーで決めても良いし、基準時間(上述の例では1時間)の中のある時刻、例えば、基準時間内に12時を含む場合は12時、などとして決めても良い。ここは加湿運転モードの説明であるので、排気運転とは、吸着運転である。例えば、朝は、空気調和システムの運転を開始するので空気調和システムにとって負荷が高い。このため、外気処理装置100は排気運転を行い、換気量を抑制することも考えられる。つまり、排気運転では、室内400の還気82が室外420へ排気されないので、室内400の空気は換気されることなく、空気調和システムによって設定温度に近づくように制御される。よって空気調和システムにとって負荷が低い。
以下△Tを熱負荷として説明をする。
△T=|Ti-Ts| (式4)
ステップS101において、指示受信部111は、現在時刻、排気時間の設定値(図7の「60-t1」に相当)、基準時間(図7の1時間に相当)を取得する。熱負荷検知部113は、熱負荷△Tを算出する。
熱負荷検知部113は、熱負荷△Tが閾値TH1よりも大きいかどうかを判定する。大きい場合は、処理はステップS103に進み、そうでない場合、処理はステップS109に進む。
ステップS103において、装置制御部112は、基準時間内に、排気運転(除湿運転モードでは再生運転、加湿運転モードでは吸着運転)を行っているかどうかを判定する。基準時間内に排気運転を行っていない合、処理はステップS104に進む。基準時間内に排気運転を行っている場合、処理はステップS105に進む。
ステップS104において、装置制御部112は排気運転行う。排気運転は、除湿運転モードでは再生運転、加湿運転モードでは吸着運転である。排気運転により、換気量が増えることによる熱負荷の増加を抑制できる。
ステップS107において、装置制御部112は、外気81の給気運転を開始する。給気運転は、除湿運転モードでは吸着運転、加湿運転モードでは再生運転である。
ステップS108において、装置制御部112は、ステップS104から排気運転を継続する。排気運転は、除湿運転モードでは再生運転、加湿運転モードでは吸着運転である。
ステップS109において、装置制御部112は、基準時間内(例:60分以内)に、排気運転を行っていうかどうかを判定する。排気運転は、除湿運転モードでは再生運転、加湿運転モードでは吸着運転である。基準時間内に排気運転を行っていない場合、処理はステップS110に進む。基準時間内に排気運転を行っている場合、処理はステップS113に進む。
ステップS110において、装置制御部112は、基準時間(60分)の残り時間(基準時間内の経過時間)が、必要な排気運転時間以下であるなら(ステップS110でYES)、ステップS111において、排気運転に移行する。排気運転は、除湿運転モードでは再生運転、加湿運転モードでは吸着運転である。ステップS110において、装置制御部112は、基準時間(60分)の残り時間(基準時間内の経過時間)が、必要な排気運転時間より大きいなら(ステップS110でNO)、ステップS112において、給気運転を継続する。
ステップS201において、指示受信部111は、現在時刻、排気時間の設定値、基準時間を取得する。人検知部114は、人感センサ114aから人数を取得する。人検知部114は人感センサ114aを介して、室内400に存在する人数を検知する。
人検知部114は、検知した人数が閾値TH2よりも小さいかどうかを判定する。小さい場合は、処理はステップS203に進み、そうでない場合、処理はステップS209に進む。以下の処理は上記のように図8と同じなので説明は省略する。
実施の形態1の外気処理装置100は、還気82を使わずにデシカント20を再生する。このため、室内400に存在するウイルス及び粉塵がデシカント20に付着することを抑制できる。これにより、ウイルス及び粉塵の室内への拡散を防止し、効率よくウイルス及び粉塵を排気できる。
また、外気処理装置100は、外気81を室外420へ排気する排気運転における換気停止時間を考慮して風量調整する。このため、単位時間あたりの必要換気量を満足できる。
これらにより、健康で快適な空間を提供できる。
また、熱負荷検知手段を備えることで、空気調和システムの熱負荷のピークを抑えるように換気を停止することができ、あるいは、人検知手段を備えることで、居住者に不快感を与えないタイミングで換気を停止する、というような排気運転が可能になり、利便性が向上する。
また、外気処理装置100の装置制御部112は、熱交換器10が加熱器10Hとして機能しているか、あるいは冷却器10Cとして機能しているかによって、ダンパー装置30の扉31a及び扉32aの開閉を制御するので、簡易な構成で、外気処理装置100を実現できる効果がある。
Claims (6)
- 加熱器としても冷却器としても機能し、外気と熱交換する熱交換器と、
前記熱交換器と熱交換した前記外気が通過する静止型除湿デバイスと、
前記静止型除湿デバイスを通過した前記外気を、前記熱交換器が加熱器と冷却器とのどちらで機能しているかに基づいて、第1流路と第2流路との何れか一方の流路へ選択的に送出する送出装置と、
を備える外気処理装置。 - 前記送出装置は、
前記第1流路として、前記外気の供給先の領域であって前記外気の供給に伴い空気が排気される領域である換気領域へ通じる供給流路に送出し、前記第2流路として、前記換気領域とは異なる別の領域に通じる別領域流路に送出し、
前記外気処理装置は、さらに、制御装置を備え、
前記制御装置は、
除湿運転を指示する除湿指示を受信する指示受信部と、
前記熱交換器を、加熱器と冷却器とのいずれかで機能させ、前記送出装置を制御する装置制御部を備え、
前記装置制御部は、
前記指示受信部が前記除湿指示を受信した場合には、前記熱交換器を加熱器として機能させていることに対応して、前記送出装置に、前記外気を前記別領域流路に送出させ、かつ、前記熱交換器を冷却器として機能させていることに対応して、前記送出装置に、前記外気を前記供給流路に送出させる請求項1に記載の外気処理装置。 - 前記指示受信部は、
加湿運転を指示する加湿指示を受信し、
前記装置制御部は、
前記指示受信部が前記加湿指示を受信した場合には、前記熱交換器を加熱器として機能させていることに対応して、前記送出装置に、前記外気を前記供給流路に送出させ、かつ、前記熱交換器を冷却器として機能させていることに対応して、前記送出装置に、前記外気を前記別領域流路に送出させる請求項2に記載の外気処理装置。 - 前記装置制御部は、
前記送出装置によって前記別領域流路へ送出される前記外気の風量に応じて、前記送出装置によって前記供給流路へ送出される外気の風量を制御する請求項2または請求項3に記載の外気処理装置。 - 前記制御装置は、さらに、
前記換気領域を空気調和する空気調和機の熱負荷を検知する熱負荷検知部を備え、
前記装置制御部は、
検知された熱負荷が閾値よりも大きいときに、前記送出装置に、前記外気を前記別領域流路に送出させる請求項2から請求項4のいずれか1項に記載の外気処理装置。 - 前記制御装置は、さらに、
前記換気領域に存在する人の数を検知する人検知部を備え、
前記装置制御部は、
前記人検知部によって検知された人数が閾値よりも小さいときに、前記送出装置に、前記外気を前記別領域流路に送出させる請求項2から請求項5のいずれか1項に記載の外気処理装置。
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